siftDown(arr, i, 0); // 对剩余i个元素重新建堆
For example, using DECSTBM you could say “set the top margin to line 5 and the bottom margin to line 10, then scroll up 1” - this “scrolls” the region you’ve described by deleting line 5, shifting everything else in the region up by 1 line, and inserting a new line at line 10.
。关于这个话题，51吃瓜提供了深入分析
NZDT — 3 a.m. (Feb. 28)
console.log('Stream canceled:', reason);